231 lines
5.6 KiB
C
231 lines
5.6 KiB
C
/* sound/soc/s3c24xx/s3c64xx-i2s-v4.c
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*
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* ALSA SoC Audio Layer - S3C64XX I2Sv4 driver
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* Copyright (c) 2010 Samsung Electronics Co. Ltd
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* Author: Jaswinder Singh <jassi.brar@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/clk.h>
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#include <linux/gpio.h>
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#include <linux/io.h>
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#include <sound/soc.h>
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#include <sound/pcm_params.h>
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#include <plat/audio.h>
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#include <mach/map.h>
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#include <mach/dma.h>
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#include "s3c-dma.h"
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#include "regs-i2s-v2.h"
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#include "s3c64xx-i2s.h"
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static struct s3c2410_dma_client s3c64xx_dma_client_out = {
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.name = "I2Sv4 PCM Stereo out"
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};
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static struct s3c2410_dma_client s3c64xx_dma_client_in = {
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.name = "I2Sv4 PCM Stereo in"
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};
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static struct s3c_dma_params s3c64xx_i2sv4_pcm_stereo_out;
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static struct s3c_dma_params s3c64xx_i2sv4_pcm_stereo_in;
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static struct s3c_i2sv2_info s3c64xx_i2sv4;
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static int s3c64xx_i2sv4_probe(struct snd_soc_dai *dai)
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{
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struct s3c_i2sv2_info *i2s = &s3c64xx_i2sv4;
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int ret = 0;
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snd_soc_dai_set_drvdata(dai, i2s);
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ret = s3c_i2sv2_probe(dai, i2s, i2s->base);
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return ret;
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}
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static int s3c_i2sv4_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *cpu_dai)
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{
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struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(cpu_dai);
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struct s3c_dma_params *dma_data;
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u32 iismod;
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dev_dbg(cpu_dai->dev, "Entered %s\n", __func__);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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dma_data = i2s->dma_playback;
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else
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dma_data = i2s->dma_capture;
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snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
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iismod = readl(i2s->regs + S3C2412_IISMOD);
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dev_dbg(cpu_dai->dev, "%s: r: IISMOD: %x\n", __func__, iismod);
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iismod &= ~S3C64XX_IISMOD_BLC_MASK;
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S8:
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iismod |= S3C64XX_IISMOD_BLC_8BIT;
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break;
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case SNDRV_PCM_FORMAT_S16_LE:
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break;
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case SNDRV_PCM_FORMAT_S24_LE:
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iismod |= S3C64XX_IISMOD_BLC_24BIT;
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break;
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}
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writel(iismod, i2s->regs + S3C2412_IISMOD);
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dev_dbg(cpu_dai->dev, "%s: w: IISMOD: %x\n", __func__, iismod);
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return 0;
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}
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static struct snd_soc_dai_ops s3c64xx_i2sv4_dai_ops = {
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.hw_params = s3c_i2sv4_hw_params,
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};
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static struct snd_soc_dai_driver s3c64xx_i2s_v4_dai = {
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.symmetric_rates = 1,
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.playback = {
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.channels_min = 2,
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.channels_max = 2,
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.rates = S3C64XX_I2S_RATES,
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.formats = S3C64XX_I2S_FMTS,
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},
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.capture = {
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.channels_min = 2,
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.channels_max = 2,
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.rates = S3C64XX_I2S_RATES,
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.formats = S3C64XX_I2S_FMTS,
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},
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.probe = s3c64xx_i2sv4_probe,
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.ops = &s3c64xx_i2sv4_dai_ops,
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};
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static __devinit int s3c64xx_i2sv4_dev_probe(struct platform_device *pdev)
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{
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struct s3c_audio_pdata *i2s_pdata;
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struct s3c_i2sv2_info *i2s;
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struct resource *res;
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int ret;
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i2s = &s3c64xx_i2sv4;
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i2s->feature |= S3C_FEATURE_CDCLKCON;
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i2s->dma_capture = &s3c64xx_i2sv4_pcm_stereo_in;
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i2s->dma_playback = &s3c64xx_i2sv4_pcm_stereo_out;
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res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
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if (!res) {
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dev_err(&pdev->dev, "Unable to get I2S-TX dma resource\n");
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return -ENXIO;
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}
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i2s->dma_playback->channel = res->start;
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res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
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if (!res) {
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dev_err(&pdev->dev, "Unable to get I2S-RX dma resource\n");
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return -ENXIO;
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}
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i2s->dma_capture->channel = res->start;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_err(&pdev->dev, "Unable to get I2S SFR address\n");
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return -ENXIO;
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}
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if (!request_mem_region(res->start, resource_size(res),
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"s3c64xx-i2s-v4")) {
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dev_err(&pdev->dev, "Unable to request SFR region\n");
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return -EBUSY;
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}
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i2s->dma_capture->dma_addr = res->start + S3C2412_IISRXD;
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i2s->dma_playback->dma_addr = res->start + S3C2412_IISTXD;
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i2s->dma_capture->client = &s3c64xx_dma_client_in;
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i2s->dma_capture->dma_size = 4;
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i2s->dma_playback->client = &s3c64xx_dma_client_out;
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i2s->dma_playback->dma_size = 4;
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i2s->base = res->start;
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i2s_pdata = pdev->dev.platform_data;
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if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
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dev_err(&pdev->dev, "Unable to configure gpio\n");
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return -EINVAL;
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}
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i2s->iis_cclk = clk_get(&pdev->dev, "audio-bus");
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if (IS_ERR(i2s->iis_cclk)) {
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dev_err(&pdev->dev, "failed to get audio-bus\n");
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ret = PTR_ERR(i2s->iis_cclk);
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goto err;
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}
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clk_enable(i2s->iis_cclk);
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ret = s3c_i2sv2_register_dai(&pdev->dev, pdev->id, &s3c64xx_i2s_v4_dai);
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if (ret != 0)
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goto err_i2sv2;
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return 0;
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err_i2sv2:
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clk_put(i2s->iis_cclk);
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err:
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return ret;
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}
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static __devexit int s3c64xx_i2sv4_dev_remove(struct platform_device *pdev)
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{
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struct s3c_i2sv2_info *i2s = &s3c64xx_i2sv4;
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struct resource *res;
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snd_soc_unregister_dai(&pdev->dev);
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clk_put(i2s->iis_cclk);
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (res)
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release_mem_region(res->start, resource_size(res));
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else
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dev_warn(&pdev->dev, "Unable to get I2S SFR address\n");
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return 0;
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}
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static struct platform_driver s3c64xx_i2sv4_driver = {
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.probe = s3c64xx_i2sv4_dev_probe,
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.remove = s3c64xx_i2sv4_dev_remove,
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.driver = {
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.name = "s3c64xx-iis-v4",
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.owner = THIS_MODULE,
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},
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};
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static int __init s3c64xx_i2sv4_init(void)
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{
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return platform_driver_register(&s3c64xx_i2sv4_driver);
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}
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module_init(s3c64xx_i2sv4_init);
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static void __exit s3c64xx_i2sv4_exit(void)
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{
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platform_driver_unregister(&s3c64xx_i2sv4_driver);
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}
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module_exit(s3c64xx_i2sv4_exit);
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/* Module information */
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MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>");
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MODULE_DESCRIPTION("S3C64XX I2Sv4 SoC Interface");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:s3c64xx-iis-v4");
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